diff --git a/index.js b/index.js
index cfe54f3..f5fdba1 100644
--- a/index.js
+++ b/index.js
@@ -307,12 +307,12 @@ async function updateProxy(firstRun) {
         );
 
         const fd = await fs.open(`${mapDir}/${file}.map`, 'w+');
-        files[file].forEach(map => {
+        for (const map of files[file]) {
             if (Array.isArray(map))
-                fs.write(fd, `${map[0]} ${map[1]}\n`);
+                await fs.write(fd, `${map[0]} ${map[1]}\n`);
             else
-                fs.write(fd, `${map}\n`);
-        });
+                await fs.write(fd, `${map}\n`);
+        }
         await fs.close(fd);
     }